#include<iostream>

using namespace std;
int main()
{

	int num;
	cout << "number:";
	cin >> num;

	if (num % 5 == 0)cout << "white";
	else if (num % 5 == 1)cout << "red";
	else if (num % 5 == 2)cout << "yellow";
	else if (num % 5 == 3)cout << "blue";
	else if (num % 5 == 4)cout << "green";
	else cout << "Error";

	int key;
	cout << "End;Press a key:";
	cin >> key;
	return 0;
}